Sidelink DRX State Control for Lower Terminal Energy Use
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Solution Overview
Problem
Existing communication systems, particularly in NR V2X, do not optimize Discontinuous Reception (DRX) for sidelink transmissions, leading to inefficient energy consumption in terminals.
Innovation Solution
Implementing a method to control DRX timers and retransmission timers based on specific events and feedback information for sidelink transmissions, optimizing power saving in terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If DRX is not optimized for sidelink transmission, then communication reliability is maintained, but energy consumption increases
Solution Approach 1:
The patent implements dynamic DRX configuration where the network device adapts DRX parameters (such as drx-OnDurationTimer, drx-SlotOffset, drx-InactivityTimer) based on real-time sidelink transmission conditions, traffic patterns, and channel states. This allows the terminal to switch between active and sleep states dynamically, reducing energy consumption while maintaining communication reliability through adaptive parameter adjustment.
Solution Approach 2:
The patent changes DRX parameters based on different transmission scenarios, QoS requirements, and channel conditions. By adjusting parameters like drx-HARQ-RTT-Timer, drx-RetransmissionTimer, and drx-MaximumDataTransmission before transitioning to sleep mode, the system optimizes the balance between energy saving and reliable data delivery, ensuring retransmissions are properly handled while minimizing unnecessary wake-ups.
2Reliability
If DRX timer is extended to ensure complete data reception, then communication reliability improves, but energy consumption increases
Solution Approach 1:
The patent utilizes feedback mechanisms where the terminal reports sidelink channel conditions, buffer status, and reception status to the network device. Based on this feedback, the network dynamically adjusts DRX timer durations and parameters, extending timers only when necessary for reliable reception while allowing earlier sleep transitions when conditions permit, thus balancing reliability and energy consumption.
Solution Approach 2:
The patent implements preliminary DRX configuration where the network device pre-configures appropriate DRX parameters based on expected traffic patterns and QoS requirements before actual transmission begins. This allows the terminal to enter sleep mode sooner with confidence that critical data will be received, reducing unnecessary extended listening periods while maintaining reliability for anticipated traffic.
Data Source
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AI summary
The present application relates to a sidelink transmission method and a terminal. The method comprises: a terminal receives downlink information, which is used for indicating a resource license of a sidelink; the terminal controls, on the basis of a first event, a state of a timer related with discontinuous reception (DRX) for the sidelink. According to embodiments of the present application, by controlling, on the basis of an event, a state of a timer related with DRX for a sidelink, the DRX is optimized, and terminal energy consumption of sidelink transmission is reduced.